Alcohol-lamp.



G. NELSON & W. G. BARKER.

ALCOHOL LAMP.

APPLIOATION FILED PEB.11. 1911.

1,061,318. Patented May13,1913.

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CHARLES NELSON AND WALTER Gr. BARKER, OF NEW YORK, N. Y., ASSIGNORS TOS. STERNAU 82; COMPANY, OF BROOKLYN, NEW YORK, A COPARTNERSHIP.

ALCOHOL-LAMP.

Specification of Letters Patent.

Patented May 13, 1913.

Application filed February 11, 1911. Serial No. 607,937.

To all whom it may concern Be it known that we, Crmnnns NELSON andWVALTER G. BARKER, citizens of the United States, residing in theborough of Brooklyn, county of Kings, city and State of New York, haveinvented a certain new and useful Alcohol-Lamp, of which the followingis a specification.

The object we have in view is the production of a lamp, burning alcoholor other spirit by means of a wick, in which, first, the device forholding the flame controlling sleeve in fixed position will be cheap andetfective; and, second, the elevating handle will be cheap, sightly andeasily and permanently attached to the spindle. These and other objectswill more fully appear from the following specification and accompanyingdrawings, considered together or separately.

In the drawings: Figure 1 is a transverse section of a lamp embodyingthe invention.

Fig. 2 is a section on the line 2-2 of Fig. 1. F1g. 3 1s a section onthe line 3--3 ot Fig. 2. Flg. 4 is an elevation of the flame controllingsleeve, showing the position of the elevating pinion. Fig. 5 is adetail, on an enlarged scale, showing the spring retaining means. Fig. 6is a section on the line 6-6 of Fig. 5. Fig. 7 is a section on the line7-7 of Figs. 5 and 6, looking in the direction of the arrow. Fig. 8 is adetail view of the sleeve holding spring; and F 9 is a detail view ofthe spindle before the spring is secured in place.

In all of the views, like parts are designated by the same referencecluiracters.

The lamp, in the embodiment of our invention chosen for illustration,embodies the usual reservoir 1, and carries the wick tube 2, the flamecontrolling sleeve 3 and a shaft or spindle t. The wick tube 2 has ascrew threaded portion 5, at its lower extremity, which engages with athreaded nipple (3 which is attached to the bottom of the reservoir 1.This holds the wick tube firmly in position within the reservoir. Thewick tube 2, which is shown without the wickthe latter filling theinside of the tube, and being omitted from the drawing, as its presencewould tend to confuse-is composed of a single piece of metal. It has aflange 7 adjacent to the top, and suitable perforations, as shown, topermit the escape of the flame and to expose surtaces ot' the wick sothat the fluid which is being consumed, may burn. The sleeve 8 surroundsthe wick tube and is adapted, to be moved up until its upper edge comesadjacent to or in contact with the flange 7. The tube is elevated by apinion S, on the shaft or spindle l, the said pinion engaging with arack 9, on the sleeve 3. The rack 9 is integral with the sleeve, a slot10 being cut or otherwise formed in the sleeve, and having one wallformed with teeth, as shown in Fig. l. The material which constitutesthe sleeve is sufficiently thick so as to produce a proper bearingsurface for engagement with the face of the pinion. This slot 10 andrack 9 may be formed by a single cutting operation by a suitable die. Itany bur is left upon the edges of the teeth of the rack, it will beunobjectionable, as it will increase the bear ing surface on the pinion.

The first portion of our invention relates to the device. or means forholding the sleeve 3 in position. This means comprises a spring 11,which is carried by the shaft or spindle 4t and engages within thebarrel or bearing 12, the latter serving as a support for the shatt orspindle. The shaft is held in position against longitudinal displacementby means of a ring or flange 13, which engages in an annular chamberformed between the end of the barrel 12 and an annular flange on thegland 14; (see Fig. 2). This holds the spindle 4; in position againstlongitudinal displacement, and maintains the pinion S in proper relationto the rack 9. As beiore stated, the spring 11 engages with the insideof the barrel 19., and by its elastic pressure will prevent the spindle4 from turning with sutlicicnt resistance to maintain the sleeve 3 inany desired position in which it may be left. The engagement ot thespring 11 with the inside of the barrel is not sutlicient, however, toprevent the spindle 1 from being readily turned or twisted by means ofthe knob or handle 15.

The details oi the spring '1 l; and its mode of attachn'lcnt to theshaft 1, are as follows: The spring is a leaf spring, bent to bow shape.It has extremities which are provided with notches 16, 16, theextremities being shown as wider than the body of the spring so that alarger notch will be provided than otherwise. The spring rests within acontact portion which is cutaway in the side of the shaft or spindle -1t(see Fig. 9) and is retained in position by portions of the shaft orspindle which are forced down into the notches 16. The cut-away portionis indicated at 17 and is a little longer than the length of the springwhen the latter is bent. The ends of the cutaway portion are formed uponcurved lines, as shown in Fig. 5, and the material under the ends is cutaway, as shown in Fig. 9, forming lips 18, said lips having theiropposing faces curved as shown in Fig. 5. The spring may be introducedin position with its ends under these lips. When it fairly rests uponthe cut-away portion, the material in about the middle of each lip isbent downward at 19, forming lugs, such lugs entering the notches 16 ofthe springs. The engagement of the lugs with the notches is notsufficiently close, however, to prevent the spring from being collapsedor otherwise bent; consequently, the spring upon being originally curvedwill elastically engage with the inside of the barrel 12. The spindlemay be introduced or removed readily from its bearing, the inclined endsof the spring permitting this to be done. The parts may be easily andcheaply put together, and they allow of efficient working, independentlyof irregularities in the dimensions of different lamps.

'The second portion of our invention relates to the knob or handle 15,and its attachment to the shaft or spindle 4. Heretofore this has beenattached to the shaft by means of screws or other separable attachingdevices. According to our invention we attach the knob directly to thespindle and secure it in place by means of a portion of the spindlewhich is upset or distorted. The knob is shown as disk-shaped, but theshape of the knob forms no portion of the invention. It is provided witha central opening through which passes a portion 20, of the spindle,which is preferably reduced in diameter as shown in Fig. 1, the portion20 being separated from the rest of the spindle by a shoulder 21. Thisreduced portion 20 is provided with one or more lips 22, which areintegrally formed with the spindle 4. Fig. 3 shows the shape of theselips. One way of forming them is by means of a tool which is drivenagainst the side of the reduced portion 20 and upsets the ma terial onboth sides, forming two lips. These lips are semi-circular, as shown inFig. 1, and have sharp edges, as will be apparent from examination ofFig. 2. The knob may be provided with a central opening slightly largerthan the diameter of the portion 20, and may be inserted in place bybeing driven over this portion until it comes in contact with theshoulder 21. The number of lips, their arrangement and shape, isimmaterial; so also the shoulder 21 may be omitted. We find that whenthe knob is made of a'semi-elastic material such as insulating materialor ebonite, it may be driven in place and will satisfactorily withstanduse. Tt cannot be withdrawn without the use of a tool. Any material thatis sufli ciently tough, durable and elastic may be used for the knob,but we prefer to use the material which is known as insulating fiber.

Our improved lamp may be used for the burning of alcohol, spirit orother fluids, and is particularly intended for use in coflee machines,chafing dishes or other analogous structures. Some portions of ourinvention, how-ever, may be used in connection with other forms of lamp.

In accordance with the provisions of the patent statutes we havedescribed the principle of our invention, together with the aparatuswhich we now consider to represent the best embodiment thereof; but wedesire to have it understood that the apparatus shown is merelyillustrative and that the invention can be carried out in other ways.

Having now described our invention, what we claim as new and desire tosecure by Letters Patent, is

1. A lamp having a controlling shaft, or spindle, a bearing for theshaft, and a leaf spring, the ends of which are carried by the shaft androtate with it and the intermediate portion of which elastically engageswith the inside of the bearing.

2. A lamp having a controlling shaft, a cut-away portion therein, a leafspring lying within the cut-away portion, said spring having notchedextremities and lips struck down from the body of the shaft and engagingwith the notches for holding the spring in place.

This specification signed and witnessed this 81 day of Jan. 1911.

CHARLES NELSON.

WALTER G. BARKER.

Witnesses:

D. I-IEssLER, A. MCKENNA.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

